KENKEN® is available in a variety of sizes and challenge levels. Universal Uclick is offering puzzles that consist of either a 4x4 (easy) or 6x6 (challenging) grid of boxes divided into “cages” marked by bold outlines. As in sudoku, all numbers (1 through 4 in an easy puzzle or 1 through 6 in a challenging one) must be used without repetition in each row and column. The difference is that all numbers in each cage must combine, using the denoted math operation, to produce the target number in the top-left corner.

Available for print / Web / HTML5 Don't have lots of time? Try this quick, challenging four-by-four puzzle. It's perfect for a quick break - not too tough that you can't finish it in just a few minutes, but hard enough to keep you on your toes and coming back for more every day!

This addictive puzzle is the only root word association game of its kind and can be solved quickly. Given root words, short definitions, parts of speech and the number of letters in each word, players work to complete the missing word at two levels. Puzzle answers always have correct words in sentences. Speed counts!

Sudoku Daily is a puzzle that uses numbers instead of words. It's a grid of 81 squares, divided into nine blocks of nine squares each. Some of the squares contain a digit. The goal is to fill in the empty squares so that the digits 1 through 9 appear just once in every row, column and individual block.

David Steinberg published his first crossword puzzle in The New York Times when he was just 14 years old, making him the second-youngest constructor to be published under Will Shortz’s editorship. At the age of 15, David became the crossword editor of the Orange County Register’s 24 affiliated newspapers.

In Up & Down Words, players use crossword-style clues to fill in two-word phrases. But here's the twist: the second word of each phrase is the first word in the phrase that follows. Players may solve the puzzle from the bottom up or from the top down -- whichever gets you to the solution quickest and is the most fun!

Word Roundup is an innovative variation on a classic format, combining the challenge of a crossword with the quick-solve satisfaction of a word search. Unlike most word searches, in which the player knows what words to look for, Word Roundup gives crossword-style clues for the hidden words. If you think word searches are too easy, or if you're looking for a new wrinkle on an old favorite, give Word Roundup a try!